At least 900 miners who were trapped in a South African mine for more than 24 hours after a power outage have been rescued.

The Sibanye-Stillwater company, which manages the Beatrix gold mine in Free State province, said on Friday that the miners will have medical tests and counselling and that it expects the mine to start operating again on Monday.

Relatives wait to be reunited with the rescued miners (AP)

Mine unions and others, however, are expressing concern that there was no functioning back-up plan for evacuation after a storm knocked out power on Wednesday night and say the incident reflects continuing safety problems in South Africa’s mines.

Company managers and unions say food and water was delivered to the trapped miners while they awaited the restoration of power, which enabled elevators to ferry them to the surface.